//ioteng.lib header file

#ifndef IOTENG_HEADER
#define IOTENG_HEADER

#include<stdio.h>
#include<math.h>

typedef unsigned char bool;

#define true 1
#define false 0

int factorial(int n);
int evensum(int s, int f);

int ftoc(int fahr);
float waterfees(float x);

float calcubenefits(float money, float rate, int n);

void ftoctable(int start, int end, int step);
int sum1ton(int n);
double sum1tonReciprocal(int n);
double sum1tonplusorminusReciprocal(int n); 
void factorialtable(int n);

bool isprime(int n);
void primetable(int n);

#endif